Simulation and Analysis of Computer Control Tracking System Based on Solar Geometric for Fresnel Lenses Concentration Photovoltics

Triple-junction solar cell achieved the highest efficiency. But the systems require concentration and accurate tracking to maintain the focus of the light on the solar cells as the sun move throughout the day. The tracking system was build with two-axis driven by motor with angle sensor feedback. The two angles were determined by solar positions which calculate from solar geometric algorithm. The driving system was closed-loop with PID control to reduce errors of the angle output. During the simulation and test, the tracker has been validated by the test data sets. The control system could meet the demand of the Fresnel concentration. With this tracking system could obviously improve the efficiency of the triple-junction solar cell.